ALSA: hda - Manage kcontrol lists

Manage all kcontrol elements created in the hda-intel driver.
This makes it possible to remove and reconfigure the controls
of each codec.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -574,6 +574,7 @@ static void snd_hda_codec_free(struct hda_codec *codec)
 	flush_scheduled_work();
 #endif
 	list_del(&codec->list);
+	snd_array_free(&codec->mixers);
 	codec->bus->caddr_tbl[codec->addr] = NULL;
 	if (codec->patch_ops.free)
 		codec->patch_ops.free(codec);
@@ -622,6 +623,7 @@ int __devinit snd_hda_codec_new(struct hda_bus *bus, unsigned int codec_addr,
 	mutex_init(&codec->spdif_mutex);
 	init_hda_cache(&codec->amp_cache, sizeof(struct hda_amp_info));
 	init_hda_cache(&codec->cmd_cache, sizeof(struct hda_cache_head));
+	snd_array_init(&codec->mixers, sizeof(struct snd_kcontrol *), 32);
 
 #ifdef CONFIG_SND_HDA_POWER_SAVE
 	INIT_DELAYED_WORK(&codec->power_work, hda_power_work);
@@ -1090,6 +1092,32 @@ struct snd_kcontrol *snd_hda_find_mixer_ctl(struct hda_codec *codec,
 	return _snd_hda_find_mixer_ctl(codec, name, 0);
 }
 
+/* Add a control element and assign to the codec */
+int snd_hda_ctl_add(struct hda_codec *codec, struct snd_kcontrol *kctl)
+{
+	int err;
+	struct snd_kcontrol **knewp;
+
+	err = snd_ctl_add(codec->bus->card, kctl);
+	if (err < 0)
+		return err;
+	knewp = snd_array_new(&codec->mixers);
+	if (!knewp)
+		return -ENOMEM;
+	*knewp = kctl;
+	return 0;
+}
+
+/* Clear all controls assigned to the given codec */
+void snd_hda_ctls_clear(struct hda_codec *codec)
+{
+	int i;
+	struct snd_kcontrol **kctls = codec->mixers.list;
+	for (i = 0; i < codec->mixers.used; i++)
+		snd_ctl_remove(codec->bus->card, kctls[i]);
+	snd_array_free(&codec->mixers);
+}
+
 /* create a virtual master control and add slaves */
 int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
 			unsigned int *tlv, const char **slaves)
@@ -1107,7 +1135,7 @@ int snd_hda_add_vmaster(struct hda_codec *codec, char *name,
 	kctl = snd_ctl_make_virtual_master(name, tlv);
 	if (!kctl)
 		return -ENOMEM;
-	err = snd_ctl_add(codec->bus->card, kctl);
+	err = snd_hda_ctl_add(codec, kctl);
 	if (err < 0)
 		return err;
 	
@@ -1571,7 +1599,7 @@ int snd_hda_create_spdif_out_ctls(struct hda_codec *codec, hda_nid_t nid)
 		kctl = snd_ctl_new1(dig_mix, codec);
 		kctl->id.index = idx;
 		kctl->private_value = nid;
-		err = snd_ctl_add(codec->bus->card, kctl);
+		err = snd_hda_ctl_add(codec, kctl);
 		if (err < 0)
 			return err;
 	}
@@ -1615,7 +1643,7 @@ int snd_hda_create_spdif_share_sw(struct hda_codec *codec,
 	if (!mout->dig_out_nid)
 		return 0;
 	/* ATTENTION: here mout is passed as private_data, instead of codec */
-	return snd_ctl_add(codec->bus->card,
+	return snd_hda_ctl_add(codec,
 			   snd_ctl_new1(&spdif_share_sw, mout));
 }
 
@@ -1717,7 +1745,7 @@ int snd_hda_create_spdif_in_ctls(struct hda_codec *codec, hda_nid_t nid)
 	for (dig_mix = dig_in_ctls; dig_mix->name; dig_mix++) {
 		kctl = snd_ctl_new1(dig_mix, codec);
 		kctl->private_value = nid;
-		err = snd_ctl_add(codec->bus->card, kctl);
+		err = snd_hda_ctl_add(codec, kctl);
 		if (err < 0)
 			return err;
 	}
@@ -2440,7 +2468,7 @@ int snd_hda_add_new_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
 		kctl = snd_ctl_new1(knew, codec);
 		if (!kctl)
 			return -ENOMEM;
-		err = snd_ctl_add(codec->bus->card, kctl);
+		err = snd_hda_ctl_add(codec, kctl);
 		if (err < 0) {
 			if (!codec->addr)
 				return err;
@@ -2448,7 +2476,7 @@ int snd_hda_add_new_ctls(struct hda_codec *codec, struct snd_kcontrol_new *knew)
 			if (!kctl)
 				return -ENOMEM;
 			kctl->id.device = codec->addr;
-			err = snd_ctl_add(codec->bus->card, kctl);
+			err = snd_hda_ctl_add(codec, kctl);
 			if (err < 0)
 				return err;
 		}

sound/pci/hda/hda_codec.h

@@ -740,6 +740,8 @@ struct hda_codec {
 	hda_nid_t start_nid;
 	u32 *wcaps;
 
+	struct snd_array mixers;	/* list of assigned mixer elements */
+
 	struct hda_cache_rec amp_cache;	/* cache for amp access */
 	struct hda_cache_rec cmd_cache;	/* cache for other commands */
 

sound/pci/hda/hda_generic.c

@@ -723,7 +723,8 @@ static int create_mixer(struct hda_codec *codec, struct hda_gnode *node,
 		if (is_loopback)
 			add_input_loopback(codec, node->nid, HDA_INPUT, index);
 		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
-		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+		err = snd_hda_ctl_add(codec, snd_ctl_new1(&knew, codec));
+		if (err < 0)
 			return err;
 		created = 1;
 	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
@@ -732,7 +733,8 @@ static int create_mixer(struct hda_codec *codec, struct hda_gnode *node,
 		if (is_loopback)
 			add_input_loopback(codec, node->nid, HDA_OUTPUT, 0);
 		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
-		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+		err = snd_hda_ctl_add(codec, snd_ctl_new1(&knew, codec));
+		if (err < 0)
 			return err;
 		created = 1;
 	}
@@ -745,14 +747,16 @@ static int create_mixer(struct hda_codec *codec, struct hda_gnode *node,
 	    (node->amp_in_caps & AC_AMPCAP_NUM_STEPS)) {
 		knew = (struct snd_kcontrol_new)HDA_CODEC_VOLUME(name, node->nid, index, HDA_INPUT);
 		snd_printdd("[%s] NID=0x%x, DIR=IN, IDX=0x%x\n", name, node->nid, index);
-		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+		err = snd_hda_ctl_add(codec, snd_ctl_new1(&knew, codec));
+		if (err < 0)
 			return err;
 		created = 1;
 	} else if ((node->wid_caps & AC_WCAP_OUT_AMP) &&
 		   (node->amp_out_caps & AC_AMPCAP_NUM_STEPS)) {
 		knew = (struct snd_kcontrol_new)HDA_CODEC_VOLUME(name, node->nid, 0, HDA_OUTPUT);
 		snd_printdd("[%s] NID=0x%x, DIR=OUT\n", name, node->nid);
-		if ((err = snd_ctl_add(codec->bus->card, snd_ctl_new1(&knew, codec))) < 0)
+		err = snd_hda_ctl_add(codec, snd_ctl_new1(&knew, codec));
+		if (err < 0)
 			return err;
 		created = 1;
 	}
@@ -849,8 +853,8 @@ static int build_input_controls(struct hda_codec *codec)
 	}
 
 	/* create input MUX if multiple sources are available */
-	if ((err = snd_ctl_add(codec->bus->card,
-			       snd_ctl_new1(&cap_sel, codec))) < 0)
+	err = snd_hda_ctl_add(codec, snd_ctl_new1(&cap_sel, codec));
+	if (err < 0)
 		return err;
 
 	/* no volume control? */
@@ -867,8 +871,8 @@ static int build_input_controls(struct hda_codec *codec)
 			HDA_CODEC_VOLUME(name, adc_node->nid,
 					 spec->input_mux.items[i].index,
 					 HDA_INPUT);
-		if ((err = snd_ctl_add(codec->bus->card,
-				       snd_ctl_new1(&knew, codec))) < 0)
+		err = snd_hda_ctl_add(codec, snd_ctl_new1(&knew, codec));
+		if (err < 0)
 			return err;
 	}
 

sound/pci/hda/hda_local.h

@@ -393,6 +393,9 @@ u32 query_amp_caps(struct hda_codec *codec, hda_nid_t nid, int direction);
 int snd_hda_override_amp_caps(struct hda_codec *codec, hda_nid_t nid, int dir,
 			      unsigned int caps);
 
+int snd_hda_ctl_add(struct hda_codec *codec, struct snd_kcontrol *kctl);
+void snd_hda_ctls_clear(struct hda_codec *codec);
+
 /*
  * hwdep interface
  */

sound/pci/hda/patch_sigmatel.c

@@ -1250,7 +1250,7 @@ static int stac92xx_build_controls(struct hda_codec *codec)
 	}
 	if (spec->num_dmuxes > 0) {
 		stac_dmux_mixer.count = spec->num_dmuxes;
-		err = snd_ctl_add(codec->bus->card,
+		err = snd_hda_ctl_add(codec,
 				  snd_ctl_new1(&stac_dmux_mixer, codec));
 		if (err < 0)
 			return err;